package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.Mapper.OrdersMapper;
import com.itheima.Mapper.ShoppingCartMapper;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.domain.*;
import com.itheima.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrdersMapperImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;//1.取出菜品	2清空

    @Autowired
    private UserService userService;//获取下单人信息name

    @Autowired
    private AddressBookService addressBookService;//查地址信息

    @Autowired
    private OrderDetailService orderDetailService;//订单详细信息

    @Transactional
    @Override
    public void submit(Orders orders) {

//        A. 获得当前用户id, 查询当前用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        LambdaQueryWrapper<ShoppingCart> shoppingCartLambdaQueryWrapper = new LambdaQueryWrapper<>();
        shoppingCartLambdaQueryWrapper.eq(currentId != null, ShoppingCart::getUserId, currentId);
        List<ShoppingCart> shoppingCartList = shoppingCartService.list(shoppingCartLambdaQueryWrapper);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new CustomException("购物车为空，不能下单");
        }
        //     B. 根据当前登录用户id, 查询用户数据
        LambdaQueryWrapper<User> userLambdaQueryWrapper = new LambdaQueryWrapper<>();
        userLambdaQueryWrapper.eq(currentId != null, User::getId, currentId);
        User userOne = userService.getOne(userLambdaQueryWrapper);
//        C. 根据地址ID, 查询地址数据
        Long addressBookId = orders.getAddressBookId();
        LambdaQueryWrapper<AddressBook> addressBookLambdaQueryWrapper = new LambdaQueryWrapper<>();
        addressBookLambdaQueryWrapper.eq(addressBookId != null, AddressBook::getId, addressBookId);
        AddressBook addressBook = addressBookService.getOne(addressBookLambdaQueryWrapper);
        if (addressBook == null) {
            throw new CustomException("用户地址信息有误，不能下单");
        }
        long orderId = IdWorker.getId();//订单号

        /*原子操作：确保线程安全。。订单总金额*/
        AtomicInteger amount = new AtomicInteger();//订单总金额
        //        D. 组装订单明细数据, 批量保存订单明细
        //组装订单明细信息
        List<OrderDetail> orderDetails = shoppingCartList.stream().map((item) -> {
            //为每一个订单明细组装数据
            OrderDetail orderDetail = new OrderDetail();
            //设置订单id
            orderDetail.setOrderId(orderId);
            //设置当前订单数量
            orderDetail.setNumber(item.getNumber());
            //设置口味信息
            orderDetail.setDishFlavor(item.getDishFlavor());
            //设置菜品
            orderDetail.setDishId(item.getDishId());
            //设置套餐
            orderDetail.setSetmealId(item.getSetmealId());
            //
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());

            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());

            log.info("amount为-------------------------------------{}", amount);
            return orderDetail;
        }).collect(Collectors.toList());

//        E. 组装订单数据, 批量保存订单数据

        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(currentId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(userOne.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);
        //清空购物车数据
        shoppingCartService.remove(shoppingCartLambdaQueryWrapper);
//        F. 删除当前用户的购物车列表数据
    }
}
